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Resillent By Design

Avatar for Smit Shah Smit Shah
April 21, 2015
Technology
130
0

Resillent By Design

How to build fault tolerant systems which can withstand failure and respond under load.

Avatar for Smit Shah

Smit Shah

April 21, 2015

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Transcript

  1. RESILIENT BY DESIGN SMIT SHAH github.com/who828 twitter.com/who828

  2. None

  3. WHY DO WE CARE ABOUT RESILIENCE?

  4. HOW DO WE BUILD A RESILIENT SYSTEM?

  5. WE MUST DESIGN FOR RESILIENCE FROM THE START

  6. RESILIENT DESIGN PATTERNS

  7. RESILIENT DESIGN PATTERNS ▸ Fail fast ▸ Bounding ▸ Circuit

    breakers ▸ SteadyState ▸ Bulkheads

  8. FAIL FAST

  9. LITTLE’S LAW: L = Λ * W L = Length

    of the Queue λ = Message Arrival Rate W = Mean Time in System
  10. None
  11. None
  12. None
  13. None

  14. BOUNDING

  15. BOUNDING ▸ Use Timeouts

  16. BOUNDING ▸ Use Timeouts ▸ Limit Memory/CPU

  17. BOUNDING ▸ Use Timeouts ▸ Limit Memory/CPU ▸ Use Explicit

    Bounded Queues

  18. CIRCUIT BREAKERS

  19. None

  20. BULKHEADS

  21. None
  22. None

  23. STEADYSTATE

  24. STEADYSTATE ▸ Avoid fiddling

  25. STEADYSTATE ▸ Avoid fiddling ▸ Roll your logs

  26. STEADYSTATE ▸ Avoid fiddling ▸ Roll your logs ▸ Have

    a data archiving strategy

  27. Software design today only talks about what systems should do.

    It doesn’t address the things systems should not do. — Michael T. Nygard

  28. PUTTING IT TOGETHER ▸ Fail fast ▸ Bound your resources

    ▸ Use circuit breakers ▸ Isolate failures

  29. QUESTIONS?

  30. REFERENCES Release It! The Art of Capacity Planning Thinking for

    Programmers Responding in Timely Manner Reactive Service Levels Queuing Theory Calculator